Just curious which lens is your favorite for landscapes, and why it's your favorite?

For film, it's the SMC Pentax-A 645 35mm F3.5 on 120 Ektar. Why? Angle of view, 645 aspect ratio, and large negative for enlargements or scans. It's just one of those WOW lenses that takes the ordinary into the extraordinary and inspires me to shoot.

If you'll forgive me, for digital my favorite is a Nikon AF-S Nikkor 20mm f/1.8G ED on Nikon D750. Does anyone have a Rokinon 20mm f/1.8 ED AS UMC that they have an opinion on the K-1 or K-1ii? I know many love their Rokis and Samys but my first and last experience was with a 14mm Rokinon on an APS-C and it was so mediocre, I haven't given them a second chance.

If you'll forgive me, for digital my favorite is a Nikon AF-S Nikkor 20mm f/1.8G ED on Nikon D750. Does anyone have a Rokinon 20mm f/1.8 ED AS UMC that they have an opinion on the K-1 or K-1ii? I know many love their Rokis and Samys but my first and last experience was with a 14mm Rokinon on an APS-C and it was so mediocre, I haven't given them a second chance.

For APS-C, another vote for the DA 21mm Limited which I've had since 2011. Very compact and great IQ. More recently, I've also been using my DA 20-40mm Limited, which of course is not as compact as its prime cousins, but it offers WR and the versatility of multiple FLs via the zoom, and is still compact for what it is. It couples well with the DA* 50-135mm, which is also quite compact for what it is. The DA 15mm Limited is also an easy-carrying addition to this kit.